What is intended by the Straight Path in this verse?

Imam Ibn al-Jawzī (d. 597/1201) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. The Book of Allah. [ Ali from the Prophet Muḥammad ﷺ]
2. The religion of Islam. [Ibn Masʿūd, Ibn ʿAbbās, al-Ḥasan, and Abū al-ʿĀliyah, among others]
3. The path which guides to Allah's religion. [Abū Ṣāliḥ from Ibn ʿAbbās, Mujāhid]
4. The path to Paradise. [Ibn ʿAbbās]

NOTE: These are ultimately different ways of describing the same thing. Whoever follows the Book of Allah will be guided to the religion of Allah, which is the path to Paradise.